﻿// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Formatting;
using Microsoft.CodeAnalysis.Formatting.Rules;
using Microsoft.CodeAnalysis.LanguageService;
using Microsoft.CodeAnalysis.Text;

namespace dnSpy.Roslyn.Internal.SmartIndent {
	abstract partial class AbstractIndentation<TSyntaxRoot> where TSyntaxRoot : SyntaxNode, ICompilationUnitSyntax {
		protected abstract ISyntaxFacts SyntaxFacts { get; }
		protected abstract IHeaderFacts HeaderFacts { get; }
		protected abstract ISyntaxFormatting SyntaxFormatting { get; }

		protected abstract AbstractFormattingRule GetSpecializedIndentationFormattingRule(FormattingOptions2.IndentStyle indentStyle);

		/// <summary>
		/// Returns <see langword="true"/> if the language specific <see
		/// cref="ISmartTokenFormatter"/> should be deferred to figure out indentation.  If so, it
		/// will be asked to <see cref="ISmartTokenFormatter.FormatToken"/> the resultant
		/// <paramref name="token"/> provided by this method.
		/// </summary>
		protected abstract bool ShouldUseTokenIndenter(Indenter indenter, out SyntaxToken token);
		protected abstract ISmartTokenFormatter CreateSmartTokenFormatter(TSyntaxRoot root, SourceText text, TextLine lineToBeIndented, IndentationOptions options, AbstractFormattingRule baseFormattingRule);

		protected abstract IndentationResult? GetDesiredIndentationWorker(Indenter indenter, SyntaxToken? token, SyntaxTrivia? trivia);
	}
}
